Intelligence hub quickstart

Start on /leaderboard for rows, /models for profiles, /news for curated updates, and /benchmarks for metric context. Every public surface keeps citations visible.

Public workflow:
1. Search a model
2. Compare source-scoped metrics
3. Open model detail
4. Verify source links and retrieval dates

Status labels:
- Replicated from public source
- EvalKit editorial assessment
- Verified by EvalKit (requires run evidence)